Kureha Kagaku Kogyo Kabushiki Kaisha

Hitachi-kokusai Electric Inc.

Kawaguti & Partners

Tadashi Nakamura

Yoshio Okada

Youichi Ohhira

Shigeru Saitoh

Tetsuya Watanabe

Koji Konno

Takashi Terauchi

Shoichi Hoshi

Yoshikazu Kokubu

Hidetoshi Nishiyama

Koichi Kawahata

Shouichi Hoshi

Hisami Hagiwara

A radio communication system includes ID control equipment, a operation control unit, line controller, pieces of base station, and radio terminals. In the radio communication system, environment information about identification information (IDs) etc. set for the radio terminals is managed effectively. In the ID control equipment, an ID information setting means sets information about IDs for the radio terminals. In the ID control equipment, the operation control unit or the line controller, an ID information storage unit (e.g. memory) stores the information about IDs set for the radio terminals by the ID control equipment.

Radio communication system having ID management apparatus, operation management apparatus and line controller

Disclosed herein is a process for selectively synthesizing the para-isomer of alkylbiphenyl in the alkylation of biphenyl with propylene or butene, employing zeolite having a molar ratio of SiO.sub.2 to Al.sub.2 O.sub.3 of not less than 10, as a catalyst.

Process for selectively alkylating biphenyl

A solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet, comprising 50 to 80% by weight of p-monoisopropylbiphenyl and 50 to 20% by weight of hydrogenated terphenyl, and a pressure-sensitive recording paper sheet prepared by using the solvent.

Solvent for chromogenic dye-precursor material for pressure-sensitive

Disclosed herein are a substantially odorless solvent for a chromogenic dye-precursor material for a pressure-sensitive recording paper sheet, which comprises from 0 to 20% by weight of m-isopropylbiphenyl, from 40 to 75% by weight of p-isopropylbiphenyl and from 5 to 40% by weight of diisopropyldiphenyl, and a pressure-sensitive recording paper sheet comprising a colour-development sheet coated with microcapsules containing a dye solution which is composed of the chromogenic dye-precursor material and the substantially odorless solvent, and a colour-developer sheet.

Disclosed herein are (1) a solvent of a chromogenic dye-precursor material for pressure-sensitive recording paper, which solvent comprises a diarylalkanes containing not less than 80% by weight of a mixture of 1-tolyl-2-phenylpropane and 1,2-ditolylethane, obtained by coupling ethylbenzene and xylene by side-chain dehydrogenation, (2) the pressure-sensitive recording paper sheet prepared by using the solvent and (3) a process for producing the solvent.

Solvent of a chromogenic dye-precursor material for pressure-sensitive

Disclosed herein are a solvent for a chromogenic dye-precursor material for a pressure-sensitive recording paper sheet, comprising (1) 30 to 80% by weight of p-monoisopropylbiphenyl or a biphenyl mixture of not less than 80% by weight of p-monoisopropylbiphenyl, not more than 20% by weight of m-monoisopropylbiphenyl and not more than 10% by weight of diisopropylbiphenyl, and (2) 70 to 20% by weight of diisopropylnaphthalene or a naphthalene mixture of not less than 97% by weight of diisopropylnaphthalene, not more than 1% by weight of monoisopropylnaphthalene and not more than 2% by weight of triisopropylnaphthalene, and a pressure-sensitive recording paper sheet prepared by using the solvent.

Solvent for the chromogenic dye-precursor material for a

Disclosed herein is a process for producing (2-hydroxy-2-propyl)naphthalene compounds, comprising oxidizing a naphthalene compound having isopropyl group(s) on the naphthalene ring in the presence of peroxodisulfate in a mixed solvent of water and an organic polar solvent.

Process for producing (2-hydroxy-2-propyl)-naphthalene compounds

Oxides of nitrogen can be removed efficiently from a gas containing such oxides of nitrogen by bringing said gas into contact with an aqueous solution containing an organic acid alkali salt and a salt of metal selected from the group consisting of Fe, Co, Ni, Cu and Mn in the presence of a sulfurous acid alkali salt. The efficiency for removing oxides of nitrogen is much improved by use of a polybasic acid alkali such as ethylenediamine tetracarboxylic acid alkali salt or nitrilo-tricarboxylic acid alkali salt as said organic acid alkali salt.

An absorbing solution for the removal of nitrogen oxide form a gas

A method of removing nitrogen oxides from a gas containing nitrogen oxides and converting same to a salt of imidodisulfonic acid, wherein the gas containing nitrogen oxides is brought into contact with an aqueous solution which contains at least one ferrous salt and at least one sulfurous acid alkali salt to absorb the nitrogen oxides in solution in the form of imidodisulfonic acid alkali salts.

Method of removing nitrogen oxides from a gas as a salt of

A diaphragm for electrolytic production of caustic alkali which consists of dual microporous layers provided on the anode and cathode sides, wherein the anode side microporous layer is made of an acid-resistant material 0.01 to 0.3 millimeter thick bored with micropores having a mean diameter of 0.05 to 1.5 microns, and the cathode side microporous layer is formed of an alkali-resistant material 1 to 6 millimeters thick bored with micropores having a diameter of 3 to 100 microns.

Diaphragm for electrolytic production of caustic alkali

A method of effectively removing nitrogen oxides which are entrained in a gas, wherein a nitrogen oxide-containing gas is brought into contact with an aqueous solution which contains at least one ferrous salt and one sulfurous acid alkali salt to absorb the nitrogen oxides in the solution in the form of imidodisulfonic acid alkali salt, hydrolyzing the imidodisulfonic acid alkali salt to obtain a hydrolyzate-containing solution, and adding nitrous acid, nitrous acid anhydride, or nitrite to the hydrolyzate-containing solution to generate nitrogen.

Method of removing nitrogen oxides from a gas containing nitrogen oxides

A method of removing nitrogen oxides from a gas containing nitrogen oxides and converting same to ammonium sulfate, wherein the gas containing nitrogen oxide is brought into contact with an aqueous solution which contains at least a ferrous salt and a sulfurous acid alkali salt to absorb the nitrogen oxides in the solution in the form of imidodisulfonic acid alkali salts, and the imidodisulfonic acid alkali salt is converted into ammonium sulfate by hydrolysis at a temperature higher than 100.degree. C after separation and recovery of the salt from solution.

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Iwaki, Japan

Tadashi Nakamura